English verb conjugation
COULD UNROLL

Regular verb: unroll - unrolled - unrolled

Affirmation

Simple form	V-ing form
I could unroll you could unroll he could unroll we could unroll you could unroll they could unroll	I could be unrolling you could be unrolling he could be unrolling we could be unrolling you could be unrolling they could be unrolling
Perfect	V-ing perfect
I could have unrolled you could have unrolled he could have unrolled we could have unrolled you could have unrolled they could have unrolled	I could have been unrolling you could have been unrolling he could have been unrolling we could have been unrolling you could have been unrolling they could have been unrolling

Negation

Simple form	V-ing form
I could not unroll you could not unroll he could not unroll we could not unroll you could not unroll they could not unroll	I could not be unrolling you could not be unrolling he could not be unrolling we could not be unrolling you could not be unrolling they could not be unrolling
Perfect	V-ing perfect
I could not have unrolled you could not have unrolled he could not have unrolled we could not have unrolled you could not have unrolled they could not have unrolled	I could not have been unrolling you could not have been unrolling he could not have been unrolling we could not have been unrolling you could not have been unrolling they could not have been unrolling

Interrogative form

Simple form	V-ing form
could I unroll? could you unroll? could he unroll? could we unroll? could you unroll? could they unroll?	could I be unrolling? could you be unrolling? could he be unrolling? could we be unrolling? could you be unrolling? could they be unrolling?
Perfect	V-ing perfect
could I have unrolled? could you have unrolled? could he have unrolled? could we have unrolled? could you have unrolled? could they have unrolled?	could I have been unrolling? could you have been unrolling? could he have been unrolling? could we have been unrolling? could you have been unrolling? could they have been unrolling?

Interro-negative form

Simple form	V-ing form
could I not unroll? could you not unroll? could he not unroll? could we not unroll? could you not unroll? could they not unroll?	could I not be unrolling? could you not be unrolling? could he not be unrolling? could we not be unrolling? could you not be unrolling? could they not be unrolling?
Perfect	V-ing perfect
could I not have unrolled? could you not have unrolled? could he not have unrolled? could we not have unrolled? could you not have unrolled? could they not have unrolled?	could I not have been unrolling? could you not have been unrolling? could he not have been unrolling? could we not have been unrolling? could you not have been unrolling? could they not have been unrolling?